Coster XTA 624 - Automatic Season Switching Logic; Seasonal Switching Based on Temperature; Seasonal Switching Based on Periods

13
E 136 - XTA 624 C1 Eng.
22.11.10 AM REV. 02
We reserve the right to make changes without notice
COSTER
• Automatic season switching according to outside temp. (only if B2 is connected).
When outside temp. remains lower than
for a period exceeding
The controller switches the action of output
Y and season control Ysc to Winter
When outside temp. remains lower than
for a period exceeding
The controller switches the action of output
Y and season control Ycs to Summer
• Automatic season switching according to room temp. (only if B3 is connected).
When Heating load value Qhea is higher than 0% and the
Cooling load value Qcoo is 0%
.
When Heating load value Qhea is 0% and the Cooling load
value Qcoo is higher than 0%
.
• Automatic season switching according to season periods. In this case,
the following conditions may occur:
– Successive season periods :
Result: no intermediate periods
From 15.10 to 15.04 = Y1
and Y2 control
From 16.04 to 14.10 = Y1
and Y2 control.
– Shortened season periods :
Result: intermediate periods with unit off
From 15.10 to 15.04 = Y1
and Y2 control
From 16.04 to 14.05 = Y1
and Y2 control in OFF
From 15.05 to 15.09 = Y1
and Y2 control
From 16.09 to 14.10 = Y1
and Y2 control IN OFF
– Overlapping season periods:
Result: overlapping periods according to outside temperature
From 02.11 to 14.03 : = Y1 and Y2 control
From 16.05 to 31.08 : = Y1
and Y2 control
From 15.03 to 15.05 and from 01.09 to 01.11 :
When outside temperature remains below temperature
for a period exceeding:
the controller switches Y1
and Y2 control
when outside temperature stays above Summer Outside Temp.
for a period exceeding:
the controller switches Y1
and Y2 control
S e a s o n S w i t c h i n g
F R . O U T S I D E T .
M3.2
O u t W i n t e r T . : 2 0 c
D e l a y : 2 4 h r s
M2.15
O u t S u m m e r T . : 2 5 c
D el a y : 4 h r s
M2.
16
S e a s o n S w i t c h i n g
F R . R O O M T .
M3.2
S e a s o n S w i t c h i n g
F R . S E A S O N S
M3.2
W i n t e r S e a s o n
F r : 1 5 . 1 0 t o : 1 5 . 0 4
M1.19
S u m m e r S e a s o n
F r : 1 6 . 0 4 t o : 1 4 . 1 0
M1.20
W i n t e r S e a s o n
F r : 1 5 . 1 0 t o : 1 5 . 0 4
M1.19
S u m m e r S e a s o n
F r : 1 5 . 0 5 t o : 1 5 . 0 9
M1.20
W i n t e r S e a s o n
F r : 0 1 . 0 9 t o : 1 5 . 0 5
M1.19
S u m m e r S e a s o n
F r : 1 5 . 0 3 t o : 0 1 . 1 1
M1.20
O u t S u m m e r T . : 2 0 c
D e l a y : 2 4 h r s
M2.15
O u t S u m m e r T . : 2 5 c
D el a y : 8 h r s
M2.16
Win.
Sum.
100% 100%0%0% 0%
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Q
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Q
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